Adjustable stop.



D. ISBELL,

ADJUSTABLE STOP.

APPLICATION FILED JULY 21, l9l6.

Patented Apr. 30,1918.

2 SHEETS-SHEET I.

vwevltoz Wihamo ed D. ISBELL.

ADJUSTABLE STOP. APPLICATION FILED JULY 21.1916.

Patentd Apr. 30, 1918.

2 SHEETSSHEET 2.

DELL I-SBELL, 0F MACE, IDAHO.

ADJUSTABLE STOP.

1264f, Mid.

Specification of Letters Patent.

Patented Apr. 3 11', f212.

Application filed July 21, 1916. Serial No. 110,582.

To all whom it may concern:

Be it known that I, DELL IsBELL, a citizen of the United States, residing at Mace, in the county of Shoshone and State of Idaho, have invented new and useful Improvements in Adjustable Stops, of which the following is a specification.

This invention relates to improvements in circuit closers and has particular application to a circuit closer wherein the space be tween the contact and the blade when the switch is open may be varied in accordance with the voltage of the current carried by.

the switch, thereby preventing the current from jumping across the gap when the switch is open.

In carrying out the resent invention, it is my purpose to provide a switch of the class described wherein the space between the contact and the blade may be varied quickly and conveniently in accordance with the voltage of the current carried by the switch so as to prevent the current from jumping across the gap when the switch is open, and wherein the switch blade will be automatically held in open position and similarly restored to such position after the switch has been closed and the blade released.

It is also my purpose to provide a switch of the type set forth which will embrace the desired features of simplicity, efficiency and durability, which will operate effectively under all conditions and wherein the component parts will be so arranged and correlated as to reduce the possibility of derangement to a minimum.

With the above and other objects in view, the invention consists in the construction, combination and arrangement of parts hereinafter set forth-in and falling within the scope of the claim.

In the accompanying drawings Figure 1 is a front elevation of a switch constructed in accordance with the present invention.

Fig. 2 is an end view thereof.

Fig. 3 is a longitudinal sectional view therethrough.

Fig. 4 is a transverse sectional view through the same.

Fig. 5 is a horizontal sectional view through the stop mechanism.

Fig. 6 is a similar view taken at right angles to Fig. 5.

Referring now to the drawings in detail,

1 designates a supporting plate having the upper end thereof outturned and curved transversely to form a hood 2. The back of the plate 1 is equipped with suitable fastening means 8 whereby the plate may be fastened to a wall, post or other support. Fastened to the outer front side of the plate 1 adjacent to the lower edge thereof and projecting outwardly therefrom are studs 4 spaced apart horizontally and formed in the outer end of one of the studs 4 is a recess 5 in which is secured a bearing 6 and rotatably mounted in the bearing 6 is a stub shaft 7 projecting outwardly from the stud and fixed to the outer end of the stub shaft 7 and arranged at right angles thereto and projecting toward the other stud is a switch blade 8. Formed in the outer end of the other stud 4 is a recess 9 and fixed within the recess 9 is a shank 10 having the Outer end thereof formed to provide a contact block 11 disposed in the path of movement of the adjacent end of the blade 8 and adapted to be engaged thereby when the blade is swung toward the contact block. Encircling the stub shaft 7 is a spring 12 having one end fastened to the bearing and the other end securedto the stub shaft and acting to hold the blade normally out of engagement with the contact block. Secured to the blade adjacent to the contact end thereof and depending therefrom is a link 13 and connected with the link 13 is one end of a strip 14 of insulating material or the like and fastened to the other end of the strip 14 is one end of a chain 15 or other flexible element, the remaining end of the chain 15 terminating within convenient reach of the operator of the switch.

Secured to the front face of the plate 1 at a point above the studs 4: and arranged centrally of the space between the studs is a block 16 and mounted in the outer end of the block 16 is a shank 17. Secured to the outer end of the shank 17 is a clamp 18 comprising a stationary section 19 integral with the outer end of the shank and a movable section 20 placed in face to face contact with the section 19 and secured thereto by means of set screws 21. Formed in the confronting faces of the sections 19 and 20 adjacent to the outer edges thereof are grooves 22 and disposed within the rooves 22 is a stop comprising a length 0 wire 23 havin one end bent at right angles as at 24 an disposed in juxtaposition-to the contact end of the blade 8 and such end of the blade is bent upwardly as at 25 so as to nicely centa-ctfivith the bent end 24 of the Wire 23;

In practice, the Wire 23 is adjusted longitudinally Within the grooves 22 to move he ben en 2 hereo aw y m t e @01 tact' 'block ll; according as it isde'sired't'o decrease or increase the space between the blade and the contact and when the Wire has been adjusted the set screws 21 are tightened to hold the Wire against movement.

In practice, the spring 12 holds the contact end of the blade normally against the stop and out of engagement with the con tact block, thereby holding the controlled circuit open and when it is desired to close the circuit,' the blade is swung into engagement with the contact block againstthe action of the spring. The spaeebetweenthe contact end of the blade and the contact block is increased and decreased according as the switch is employed for high voltage currents and low voltage currents.

While I have herein shown and described the preferred form of my invention by Way of'i-llu'stration, I wish it to be understood that I do not limit or confine myself to the preei'sddetails of construction herein described and delineated, as modification and variation may be made Within the scope of the claim and ithout departing from the spirit of the invention.

I claim:

A stop comprising a block mounted on a fixture, a clampcarri ed by the block and including a fixed section and a movable section, and an arm slidably and rotatably mounted in the clamp, the free end of the arm beyond the clamp having a right-angled terminal.

In testimony whereof I affix my signature in presence of two Witnesses.

' DELL ISBELL. Witnesses:

JAs. P. GROULVEY, GEO.

gppgcepf gni s gatent may be attained for five cents each, by addressing the Commissioner of Patents.

w sh nzwe 116- 

